Liquid-supply apparatus



March 6, 1928. 1,661,359

w. A. CHRYST ET AL LIQUID SUPPLY APPARATUS Filed May 28. 1925 Patented Mar; 6, 192s 'uurrso snrsis WILLL AM A. CE BYST AND HERBERT G. WALTE'"R$, F DAYTON, OHIO, ASEIGNOE'S, BY? MESNE ASEEIGNMENTS, T0 DELCO-REMY CORPORATIUN, 0E DAYTON, @HIO, .51 core PURATIL'GN 0F DELAWME.

LIQUID-SUPPLY APFARA'IUd.

Application filed May 28, 18%. serial Ilo. $3,469"

This invention relates to liquid supply ingr "for the pump serving as e cover for the opening in the tenlr.

Uther objects include simplicity oi con struction and consequent reduction in the cost of mnnui uetur Further obiects andodvantnges oi the present invention will. be apparent from the "following; description, reference being held to the accompanying drawings, wherein a pre- "lerred form oi the present invention is clearly shown In the drewings:

Fin. 1 is s plan view of the apparatus shown in filoolring in the direction of the :irro'w l in 2;

l ig. 23 is e longitudinal sectionel view on the line 2-2 out Fig,- l.

Referring to the drawings, designates a. liquid tent: such as the rear fuel tenlr of an automobile The tank is provided with on opening 21 near the top well thereof, the opening being surrounded by n tubular member 292 having; e flange 2% which is welded to or otherwise permanently ins toned to the motel wall ct the tank 20. The tube 2% is threaded to receive a nut 23 which clumps ugrninst the end of the tube 22q n gnslret fi l, n flange 25 of a cup-shaped mnrrnetizuble housing member 26, the periphery oi mngznctizable plate 27 and the "dense 28 of somewhnt conical housing member, 29; The members 26 and 29 provide a housing for the pump and the plots E2? constitutes partition dividing the houstill wil

surrounds s non-magnetizable tube 31 forming at part of the fuel duct and providing pump cylinder. The tube 31 is threaded at upper end to receive a tubulmrmember 32 which is provided with an annular, 1nwsrdlyextending ledge 33 dividing the tube lid -into a spring chamber 34 and a Contact chamber 35, the outer end of which is closed ing into two compartments and also supporting a msgrnctizable bushing '30 which "a short distance above the upper end of the by n non-conducting disc 36 The annular es flange 33 is provided with n central nperture for receiving it movable contact sup port 3'? carrying a movable contact 38 which cooperates with a stationary contact 39 mounted on the lower end of en adjusting es screw 40 which is thrended into n bushing til carried by the disc 36 The screw is held in adjusted position by lock nut 42. The screw 40 provides for connecting it wire terminsl clip 43 which is held by s nut The lower well of the housing 26 ports s tubular msguetizeble core member n portion of which is received by the tube 31. The member 50 is threaded to receive e bushing 51 cnrryiug an inlet pipebfi which to extends near the bottom of the tenlr 20. The tube 52 curries e strainer 53. The members 52, 51, 50, 31 and32 providea liquid duct extending from the bottom oil the term to at point above the tank where the outlet from the member 32 is connected with n pipe cou pling The pumping mechanism within the liq uidduct includes a piston -30 which reciprosates within the cylinder 31 and between the upper portion of the member 50 end the lower portion of the member 32. The piston is moved downwardly by an electromagnet to be described later, and upwnrdly by as spring 61 which is received within the piston 60, and bears against the well of the piston at its upper end,,nnd bears at its lower end against the upper end of the member 50. In order to cushion the movement oi the piston upwardly into engagement with the member 32, an annular groove 62 is provided in the upper well of the piston and is telescopically engaged with the lower end or" the member 32 in order to provide cushioning dsshpotu The member 50 is provided with an extension having n conical surface 63 which receives enonmegnetissble tube 64 having it correspondingconicnl surface and a cylindrical surface 65 extending 108! member 50. The member 64: is provided with an annular, inwardly-extending flange 66 which is received by a groove 67 in the member 50 thereby retaining the member 64 in position. The cylindrical portion lib receives the lower end of spring 61 to menu tain it in position and the portion 65 is telescopicslly reeeived by the central bore of the piston 60 in order to provide a cushioning dashpot between the member (34 and the lower end of the piston which is provided with a conical surface 68 for receiving the conical surface of the member (34. By cushioning the to-and-fro movements of thepiston at the end of each stroke, the pump is rendered practically noiseless. The tube (34 provides a non-magnetizable stop limitingmovement of the piston (50 toward the core 50.

The pump inlet valve comprises a disc 70 which co-operates with a seat provided in the upper end of the bushing 51. The disc 70 is retained by a cage comprising a disc 71 spaced from the upper end of the bushing 51 and attached thereto by three legs 72, each of which is provided at its lower end with an inwardly-extending flange 72 received by a groove Til provided by the bushing 51. The piston outlet valve is provided by a disc 70 which is retained upon the upper end of the piston by a valve cage 71 the disc and cage corresponding in construction and function to the parts 70 and 71, respectively, described. The valve cage 71 serves also to receive and retain the lower end of a spring 75 the upper end of which receives the lower end'of the contact support 37.

The mechanism for operating the pump includes the spring 61 for moving the piston 60 upwardly and an elcctro-magnet for moving the piston downwardly. The electro-magnet comprises a magnet winding surrounding the core member 50 and the tube 31. The magnetic circuit of the magnet comprises the member 50, the housing 26, plate 27, collar 30 and the pump piston 60 which constitutes a movable magnetizable core or armature. The stationary, insulated contact 39 is connected with one end of the magnet coil 80 and the other end is connected with a terminal 81, insulatingly supported by a socket base 82 closing one end of a socket tube 83 of the conventional type, for receiving a plug having a terminal adapted to be engaged by the terminal 81. In this manner the terminal 81 is connected by a wire with the battery or other current source, having a ground connection with the tank 20. In a vehicle, the tank 20 is supported by a metallic connection with the frame of the vehicle upon which the storage battery is grounded. The ground connection of the pump is provided by the contact 38 which is connected by metallic parts with the nut 23.

When the terminal 81 is connected with a current source and the contacts 38 and 39 are in engagement as shown. the coil 80 will be energized and will attract the piston 60. Movement of the piston 60 toward the stationaiy core member 50 will cause the pressure of the spring 75 upon the contacts 38 menace and 39 to be relieved, thereby causing the circuit to be broken at the contacts. Then the magnet will be energized and the spring 61 will be released to return the piston 60 to upper position. This movement of the piston 60 will cause the spring 75 to apply pressure again between the contacts 38 and 39 thereby establishing the electrical circuit to the magnet 80. In this manner the piston 60 is reciprocated and liquid is caused to flow from the tank 20 through the fuel duct and out through pipe connection 54.

One of the advantages of the present invention is that it may be constructed as a unitary structure, separate from the tank and may be quickly attached to the tank. Another advantage lies in simplicity of construction, which has been brought about articularly by placing movable elements 0 the pump and the movable contact support in tandem relation. By this arrangement the construction of the mechanism for controlling the contacts is much simplified. The piston 60 cooperates directly with the spring which controls the pressure between the contacts.

\Vhile the form of embodiment of the invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted. all coming within the scope of the claims which follow.

What is claimed is as follows:

1. A liquid pump comprising, in combination, a non-magnetizable cylinder. a magnetizable tubular piston slidable within the cylinder, an electromagnet surrounding the cylinder for operating the piston, a tubular duct connected with the cylinder outlet end and aligned with the cylinder and providing a pump outlet, a circuit breaker contact insulatingly supported by and within the tubular duct and in alignment with the piston, a movable contact located between the piston and stationary contact, and a spring located between the piston and movable contact and movable with the piston.

2. A liquid pump comprising. in combination, ,a magnetizahle cup-shaped member, a magnetizable cover for said member. a tubular magnetizable core supported by the bottom wall of the cup member. a non-magnetizable cylinder supported by and continuing from the core and extending through the cover and supported thereby, a magnetizable piston within the cylinder, a fuel outlet and circuit interrupter housing member attached to and extending from the cylinder. a check valve in the tubular core, a check valve carried by the piston, a magnet coil within the cup member and surrounding the cylinder, and a circuit interrupter within the housing and operated by the piston for controlling the magnet coil.

3. A liquid pump comprising. in combination, a non-magnetizable cylinder, a tubular magnetizable core attached to one end of the cylinder, a liquid outlet and circuit interrupter housing member attached to the ofthe housing member and in ali' I out with the piston, acoiled spring wit in the housing member and bearing at one end against the piston valve cage, and a movable '15 interrupter contact supported by the other end of the spring.

In testimony whereof we heretoaflix our signatures.

.WILLIAM A. .CHRYST. HE BERT 0. WALTERS. 

